'Captain America Trailer': Extended Peek Released (VIDEO)

Chris Evans goes from CGI-skinny to super soldier in the first extended peak at "Captain America."

Evans stars as the iconic hero in the Marvel-Paramount film adaptation of the iconic comic book, a big summer blockbuster set for a July release.

To whet the public's appetite, Paramount finally released the extended teaser trailer of the film, which packs action and origin story in equally exciting punches. In a summer filled with Marvel film adaptations -- "Thor" and "X-Men: First Class" are also hitting theaters -- this is the most highly anticipated, and watching the trailer, it's easy to understand why.

Don't tell Steve Rogers he's too slight to fight -- it just takes some special new technology to make him a Nazi-killing machine. Then, he does a whole lot of fighting and killing.